I received this code from TID after I returned from a recent overseas trip. It says feel free to share with family and friends but does not mention a expiry date.
If your quote is more than $100, you may use this code "TIDXMAS2009" which gives you 10% off.
Would recommend shopping around.
It is underwritten by Allianz. I think they underwrite a lot of other travel insurance policies out there, including policies booked through Virgin Blue / NAB.
I booked 1-year multi travel insurance through NAB at about $229 per person.
Going through TID, the quote was $354 pp. The deal wasn't comparable.